ML20009B183
| ML20009B183 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 07/01/1981 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20009B177 | List: |
| References | |
| NUDOCS 8107150015 | |
| Download: ML20009B183 (1) | |
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a 3.1.2.1.9 Entroinm2nt-Studies Objeetive The ohjective of the entrainment studies is to quantify the zooplankton (including fish eggs and larvae) that pass through the plants in order to assess the proportion of the zooplankton pc 21ation subject to the entrair. ment stresses.
t Specification Saeplesforzoopianktonincludingfisheggsandlarvaeshall be collected at the plant discharges.
Sampling shall be done weekly and alternately at Units 1 and 2 so that each unit is sampled every other week. From January through September, three samples -;all be taken both day and night, three days per week.
From October through December three samples shall be taken both day and night on one day each week.
Deviations from this sampling schedule are permitted uben all circulating water pumps are not operating at both units. The*
required number of weekly saeples shall be obtained as long as the unit has at least one circulating pump operating.
Tish eggs and larvae shall be sorted and identified to the lowest practical taxonomic level in all samples.
One day and one night sample per week shall be processed for the identification of all i
zooplankten.
Samples shall be collected using one ceter diameter plankton nets with a 0.333 cm mesh size. Alternate types of gear were evaluated for sacpling the condenst- :coling system in an attempt to deter =ine the sampling metcod a'Ed location in the cooling system that would provide the most"Yepresentative quantitative estimates of organists entrained.
The method and location judged cost suitable was then selected for the routing samplings.
Reporting Recuirecent The number of fish eggs and larvae and other zooplankton entrained is directly related to the abundance in waters adjacent to tb.e intake. A prompt report shall be submitted in
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accordance with Section 5.6.2.a(2) when a species or zooplankton group is entrained in numbers disproportionately large in relation to the local abundance. Reporting requirements shall be more easily defined when verification of.the mathematical models is finalized.
Otherwise data shall be reported on a routine basis as described in Section 5.6.1.
Bases Entrainmer.t studies utilizi ; stationary plankton nets and other techniques at Millstone Unit 1 intake, cischarge ind 8107150015 910701 PDR ADOCK 05000245 P
PDR Millstone 1:
Amendment f 3, 75 (Correction, Culy 1,1981) 3,3;j Millstone 2:
A: erd:ent cJ 65
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